Power-transmission mechanism



G. A.`GR.l\r-1LU`|\:rJ`

PowER TRANSMISSION MECH/mmm Filed Mayfl, 1921 2 sheets-Sme?.` 1

; Il? #WH I I Sept. 29, 1925. 1,555,200

G. A. GRANLUND POWER TRANSMISS ION MECHANI SM Sept. 29, 1925o Filed May31, 1921 2 Sheets-Sheet 2 Patented Sept. 29, 1925,

UNITED STATES 1,555,200 feATfENT foFrFi 'GUSTA-F A. CRANLUND, lorCINCINNATI, oHIo, AssIeNoR ToTHn GREAVES fKinosivIAN rIooL COMPANY, orCINCINNATI, oIlIIo, ATCoRPoR-ATION oF oHIo.

\ PoWER-TRANsMIssIoNf MCHANI'SM.

Appncationeied May 31,1921. Serial Nb. 47a'e71.

To .iZZJwhom it may concern."

-Be itlmovvn that I, GnsTAF A.'GRANLUND, a citizen of the United Statesof America,

and a resident of Cincinnati, in the county f of Hamilton and vState ofOhio, haveA in- I.vented a 'new and useful Improvement in aPowerlTransmission Mechanism, of which reverse .gearing respectively ofa'machine upon Which the clutch is used.

These and other objects are attained by theineans .described herein anddisclosed in the-accompanying drawings, in Which- Fig. l is a fragmentalview of a -lathe y head .having embodied therein a device of invention,part being shown in cross sectioin y 2 is ave'r'tic'al section of alathe head showing the device mounted therein.

F 3 is a cross sectional View on line 3 3 of Fig. 4.

1F ig. 4 is a fragmental elevational view, parts being broken avvay.

invention comprises a main fdrive lshaft Vb'upon ivhich are mountedrclutches YH and 'H through which power-is transmitted .either in laforwardy or a 'reverse direction to .asleeve e, upon which is mount ed aseries of gears e7, Which gearsja'r'e at all times in driving engagementwith gears driven directly by the clutch mechanisms. Thergears c7.mountedupon the sleeve e are adapted to either `drive the sleeve, or tobe revolubly actuated upon the sleeve, the sleeve having mounted uponYit a second series ofgears ivhich may be eitherdriven bythe sleeve orbe revolubly actuated upon the sleeve, fthefse'c'nd series of gearsbeing at alltimes in engagement ivitl'i the gears mounted on :a countershaft f, fronrvvhich ycounter shaft the live spindle or driven shaft isdriven.

The clutches are revolubly-mountedupon the shaft Z) and'either one Vmaybe operated upon so as to be ydriven by the driveshaft.

fOHeemah-s adapted @transmit motion to Ian auxiliaryfdrive meel'ianismlC, and the other is adapted to vtransmit motion to Aa rey'ersedrive'mechanism D. y

`lhen 'c'lutc'h'inechanisms iand H yare 'substantially 'the' 'same and adescription of one 1Will 's ufficel for both. Each [clutch .mechanism'eompiises' ahou'sing 7L comprising a' radialplateft"aboiitjtheperiphery Aof yivhich Vextends "a flange 71,2 ihaving its inne'r surface"72,3 substantially concentric 'with the shaft Y), upon which the clutchmechanisln i's ,moui`1ted. 'hub 7b4 is 'formed uponvthe'centermost-portionfo'f the plate '72, and

keyed to the auxiliary drive shaft o. v'The flange h5 'of the reversedrive clutch Hf'is mounted upon the' sleeve 'L25 ievolubly supported'byball bearing h2?, and the 'fia-nge h5 'liasfniou'nted uponit and keyedto it the ge'ariz, Whichne'shes vvvith a gear mounted onthe reversedrive shaft d. Contained inteiiorlyto the annularflange h2 formed vonthe housing, is afsplit clutch shoe ZL?. Normally the clutch s'loe visVdisen'gaged from 'the Ainner surface 7&3 ofthe flange 7L?, but When thelclutch shoe is expanded, it binds u on andma'kes a frictionaldrivingcontact with the yfl'aiigg-i of the housing. Alblock 'Zag is niount'ed upon lthe shaft Z) and is keyed thereto. This block isvdisposed intermedivate the housings L. The block has a series of radialnotches- Lg'in which are slidably `mounted.pins 71,19 yen' aging theclutch shoes disposed lWithin the clutches H vand H. In

ythis the `rotatory movement ofthe shaft o is transmitted t`o the clutchshoes 72,7. Each clutch shoe yhas mounted upon one of its rends adjacentthesplittherein, a lever arm lill. The lever arm Yis piv'otall'y mountedupon apin h1? extending through one ofthe bifurcated endsof the clutchshoe. This pin has formed upnit a bearing eccentric to the axisofthe pinandupon this eccentric 'part of thepinis mounted the lever arm Ln. Fromthis itis readily apparent that Vby revolubly aetuating the pin,

itgis possible to reciprocate lever 'arm/iu. This f arrangement is usedforjthe purpose -f-adjustng the device. The free 'end of the lever '7h11extends toa 'place immediately adjacentthe -sha'ft'b and isretainediinprox- Vimity to theshaft b byinean's of' a link 7am,

ont. l@ad tiene; is .pivaniympaata tween the branches :di the aandbifurcaed end of the clutch shoe. The link 71,14 has a bifurcated end,the branches of which extend on either side of the lever arm 71111 andwhich ends are pivotally connected to the lever arm by means of a'pivot7115. The end of the pin adjacent the block 71S has formed upon it a.head 7115 upon which a series of circumferential ratchet teeth 7L areformed. A spring plate 71.1s is mounted upon the block 71.8 and isadapted to engage the teeth formed on the pin. From the foregoing it isreadily apparent that by revolubly actuating the pin, the spring plate7118 will engage in different notches between different teeth, and willserve to retain the eccentric portion of the pin in 'an adjustedposition. The head of the pin is preferably cross slotted, as shown inFig. 3, to permit ready adjustmentof the pin. The shaft 7) has formedwithin it radial slots 7h11 registering with those places over which thelever arms l7111 extend. Within the slots 71.11 are reciprocally mountedthe pins 71,2". The ends of the pins A712" are preferably rounded. Areciprocating rod 71.21 is mounted within the bore 792 of the shaft b.The reciprocating rod has formed upon it the tapered faces 793 and 794,see Fig. l, terminating upon the shoulders b5 and be respectively. Thecentermost parts of the pins 702 engage the reciprocating rod 7121, andthe outermost parts of the pins'engage the lever arms 7111. The springs7L26 retain the lever arms 7L11 in engagement with the pins 712.Suitable means such as a yoke may be mounted upon the end o-f thereciprocating rod 71,21, which extends from the shaft, and whereby thereciprocating rod may be longitudinally' actuated within the bore of theshaft. Afork engages the yoke.

The operation of my device is as follows:

Normallythe clutch shoes are disengaged from the clutch flanges 712.Motion is transmitted to the main drive shaft or shaft 7). 117e willassume that the parts are in the positions as shown in Fig. 1. Thereciprocating rod 7t21 is moved longitudinally into the bore in the maindrive shaft, whereupon the pin 71.2 of the reverse drive clutchf-H ismoved outwardly by the engagement of the pin upon the tapered face 793,and the shoulder b5 formed on the reciprocating rod.

The outward movement of the pin h2o moves the lever arm 71,11 and thelink 71.14, about their pivotal mountings and causes the lever arm andthe link to expand the clutch shoe, whereupon the clutch shoe binds uponthe clutch flange and motion is transmitted 4from the main drive shaft7) to the reverse drive mechanism by way of the gear h6. When thereciprocating rod 7t21 is moved longitudinally out of the bore in theshaft 7;, the forwardly driving rclutch H is driven from the shaft andmotion is transmitted from the clutch H to the auxiliary drive shaft c.Motion from the auxiliary drive shaft is imparted to the primary gearsc7 by means of the gear c keyed upon the auxiliary drive shaft and theprimary gear e7 is revolubly actuated upon the sleeve e withoutactuating the sleeve c. The entire mechanism contained within the casingA is immersed in oil.

A spring 7126 may be employed to retain the clutch shoe in normallydisengaged relation to the housing 71. The reciprocating rod 7121 mayhave inclined surfaces exposed to the pins 712 on both sides of theshoulders or landings b4 and 796. This is an additional means ofovercoming wear.

What I claim is 1. A clutch mechanism comprising a shaft having an axialbore and a radial bore communicating with the axial bore, a blockmounted on the shaft, a housing revolubly mounted on the shaft over theradial bore therein, a split clutch shoe within the housingv mounted forrotation with the block, a pin revolubly mounted on one end of theclutch shoe, an eccentric bearing mounted intermediate the ends of saidpins, a lever arm on the eccentric bearing, a notched flange on theeccentric bearing, a spring engaging 4the.

notches in the notched flange for securing said bearing against rotationand providing an adjustment for the lever arm, a link pivotally mountedon the lever arm and the free end of the clutch shoe, a shouldered rodreciprocable in the axial bore in the shaft, a pin in the radial bore inthe shaft actuated by the shouldered rod for moving the lever armwhereby the clutch shoe is expanded to frictionally engage the housing,and yielding means for holding the lever arm in engagement with the pinin the radial bore in the shaft. Y

2. A clutch mechanism comprising a shaft having an axial bore and aradial bore communicating with the axial bore, a housing revolublymounted on the shaft adjacent the radial bore, a split clutch shoewithin the housing and mounted for rotation with the shaft, a revolublepin on one end of the clutch shoe, an eccentric bearing intermediate theends of the pin, a lever arm mounted on the bearing, ratchet meanssecuring the bearing against rotation for adjusting the lever arm, alink connecting the lever arm and the free end of the clutch shoe, ashouldered rod mounted for reciprocation in the axial bore in the shaft,a pin extending through the radial bore in the shaft and adapted to beactuated by the shouldered rod for moving the leverarm whereby theclutch shoe is expanded, and yielding means for holding the lever armagainst the end of the 3. A clutch mechanism comprising a shaft havingan axial bore and a communicating radial bore therein, an expansiblesplit Clutch $111.0@ mounted for rQttlQn with the iic shaft, a freelyrevoluble housing carried by the shaft, an eccentric bearing rotatablyadjustable on one end of the clutch shoe, a pivotally mounted link onthe other` end of the clutch shoe, a lever arm having its opposite endspivotally mounted on the bearing and the free end of the link, a pinieciprocally carried in the radial bore in the Shaft and having its oneend in abutment With the lever arm, and a shouldered rod in the axial 10bore in the shaft for moving the pin Whereby the leveiai'm is actuatedto expand the clutch shoe.

In testimony whereof, I have hereunto subscribed my name this 26th dayof May, 15

GUSTAF A. GRANLUND.

